How do I discover my password for installing new versions of Adobe Flash Player?

I am trying to open up my o2 mobiel phone account in order to read my bills but I am being blocked from doing this by an instruction to install the latest version of Adobe Flash Player. I go through the various of stages of downloading until I reach the requirement for my password. This appears not to be my ordinary Adobe password which I can remember and have used today to enter the Adobe member system. It seems to be another password altogether. I am forced to guess what it is, and its not one of my usual passwords. After a few failures I am given a clue: "I left my heart in" - and the answer isn't San Francisco! So how do I get past this obstacle. At present I am blocked from discovering why 02 is billing for a large sum of money but the obstacle will recur in other circumstances soon, I am sure. Your help, please, Adobe Experts!!!!!